Pawelczyk E, Marciniec B
Pol J Pharmacol Pharm. 1977 Mar-Apr;29(2):137-42.
The rate and type of the photochemical degradation of perazine derivatives in acidic aqueous solutions depends upon the nature of the substituent at C2 atom. Free perazine degrades by two parallel reactions, namely a fast reversible first-order photooxidation and a slow zero-order photolysis. An introduction of the substituent in the C2 position results frequently in the elimination of one of these reactions.